Electric heater



r. q. VA'N -DY'KE. ELECTRIC HEATER. I APPLICATION FILED NOV- 15. 1920.

1,418,496. Patented June 6, 1922.

ATTORNEY.-

PATENT orrlca.

FRANK G. VAN DYKE, 'OF DETROIT, MICHIGAN.

ELFLITRIC HEATER.

Specification of Letters Patent.

Patented June 6, 1922.

Application filed November 15, 1920. Serial No. 424,102.

To all whom it may concern:

Be it known that I, 'FRANK G. VAN DYKE, a citizen of theUnited States,and residing at Detroit, in the county of Wayne and State of Michigan,have invented a new and Improved Electric Heater, of which the followingis a specification.

This invention relates to a flexible ribbonlike electric heater whichmay be attached to cups, bowls, tubes, and to tubular and sphericalbodies generally, and itsobject is to provide a heating device of thischaracter which may be readily bent to conform. to the body to beheated, which will have comparatively great heating capacity, and whichmay be readily adjusted to bodies of different dimensions.

This invention consists in the details of construction illustrated inthe accompanying drawings and particularly pointed out in the claims.

In the drawing, Fig.1 is an elevation of an intake manifold of aninternal combustion engine and a carbureter attached thereto, andheating devices secured to the carburetor float chamber and carburetingchamber and to the shank of the intake manifold. l 'tig. 2 is an outsideelevation of this improved heater. Fig. 3 is an inside elevation of oneend thereof. Fig. 4 is a section on the line l--ii of Fig. 2. Fig. 5 isa section on the line 5-43 of Fig. 3. Fig. 6 is a section on the line 66of Fig. 5. Fig. 7 is an elevation of one end of the heating element.Fig. 8 is a plan on a smaller scale of the heater when bent tocylindrical form.

Similar reference characters refer to like parts throughout the severalviews.

This electric heater embodies a flat heatin g element, preferably theelement 1 shown in Fig. 7, which has a plurality of strands 2 united bythe ends 3 which are formed with the holes 4 to receive the stems of thebinding posts 5. On the, outside of this element is the strip 6 ofinsulation, preferably mica, which receives the heads of the posts 5,and outside of the strip 6 is an imperforate second strip 7.

Back of the heating element is a strip 8 of insulation, which may bemica or asbestos, and enclosing the heating element and theinsulationsis a shell formed of a. strip of sheet metal comprising aback 9 and bentover side edges 10. At the ends of the shell the sideedges are in the form of ears 12 and the ends of the back are bentforward to form the hooks 13.

On the ends of the posts 5 are nuts 14 and the connector wires aresecured between these nuts and the metal washers 15 (see Fig. 4).Insulating washers 16 separate the posts from the back 9 of the heatershell, which is cut out at 17 so as not to touch the screws which areheld from moving out of lace by the inner mica strip 6.

F aste-ners 18 in the form. of metal ribbons are attached to the ends ofthe heater and have slots 19 to receive the hooks 13, the outer edges 20of the cross bars between the slots being preferably tipped slightly soas to insure proper engagement with the hooks 13. The ears 12 at theends of the edges 10 are bent-down when the fasteners have beenpositioned to prevent displacement. At their outer ends these fastenersare preferably formed with. stiffening flanges 22 and holes 23 toreceive the bolt 24 by means of which the heater may be secured to thebody 21 to be heated.

In Fig. 1 I have shown a grounded battery 25 connected to a switch 26and wires 27,- 28 and 29 connecting to heaters A, B and C mounted on theneck of the intake manifold 30, on the carbureting chamber 31 of acarbureter and on the bowl. 32 thereof respectively. Wires 33, 84 and 35respectively connect these'heaters to a bolt 36 to ground the'circuits.It will be understood that any one or two of these heaters may beomitted and that they may be employed wherever else such devices may berequired.

The details and proportions of the various parts may be varied by thoseskilled in the art without departing from the spirit of my invention asset forth in the following claims.

I claim.: I

1. An electric heater comprising a sheet metal strip having its edgesfolded over, two strips of insulation and a heating element between themheld in position by the edges of the strip, adjustable" fasteningdevices at the ends of the metal strip and having holes in their ends, abolt passing through said holes to draw the heater around the article tobe heated, said heating element comprising flat parallel strands andends connected integrally to the strips, and binding posts extendingfrom the ends of the heating element.

2. An electric heater comprising a. sheet metal strip having its edgesbent over, strips of insulation and a heating element between theinsulations held in position by said edges, the ends of the metal stripbeing formed with hooks, fastening devices in the form of metal ribbonsformed with transverse slots and extending between the sheet metal stripand its bent-over edges, the hooks at the ends of the strip extendinginto said slots, and means to connect the ends of said fasteners.

3. An electric heater comprising a sheet metal strip having its edgesbent over, strips of insulation and a heating element between theinsulations held in position by said edges, the ends of the metal stripbeing formed with hooks, fastening devices in the form of metal ribbonsformed with transverse slots and extending between the sheet metal stripand its bent-over edges, the hooks at the ends of the strip extendinginto said slots, means to connect the ends of said fasteners comprisinga bolt extending through holes in the outer ends of the fasteners, theedges of the ends of the fasteners being bent up to stiffen such ends.

FRANK G. VAN DYKE.

